- LABDANES FROM CRYPTOMERIA JAPONICA
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Twenty-seven labdanes were isolated from the leaves of Cryptomeria japonica.The new compounds include 15-(2-oxopropylidene)labd-8(17)-en-19-oic acid, 15-oxolabda-8(17),13(E)-dien-19-oic acid, 7β-acetoxy-15-hydroxylabda-8(17),13E-dien-19-oic acid methyl ester, 14-hydroxy-15-norlabd-8(17)-en-19-oic acid methyl ester, 15-hydroxylabda-8(17),13Z-dien-19-oic acid methyl ester, 15,16-epoxylabda-13(16),14-dien-8α,19-diol, 8α-hydroxylabda-13(16),14-dien-19-yl p-methoxycinnamate, an ester formed by 15-acetylisocupressic acid and cryptomeridiol and an ether formed by isocupressic acid and cryptomeridiol. - Key words: Cryptomeria japonica; Taxodiaceae; leaves; diterpenes; labdane-type.
- Su, Wen-Chiung,Fang, Jim-Min,Cheng, Yu-Shia
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p. 1109 - 1114
(2007/10/02)
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